I was a little worried when I read some of the reviews that said these shoes came up very large, with a warning to beware of the unisex sizing. I think some people have confused the fact that these Birkenstocks are in fact a unisex style. The sizing runs true. Those people who found them very large probably need to buy the narrow fit version. I tried on the narrow fit in a size 38 in a shop and found them very small, the regular fit size 38 fit perfectly. I'm happier still, that even with p&p these cost less to order than to buy in the shop.